The Primitive Subsistence agriculture is practised in which of the following regions ?

Tropical regions

The correct answer is Option 2: Tropical regions

Primitive subsistence agriculture is mainly practised in tropical regions of the world, especially in areas with high temperature and heavy rainfall. It is commonly associated with shifting cultivation in parts of Asia, Africa, and South America.

NCERT: "Primitive subsistence agriculture or shifting cultivation is widely practised by many tribes in the tropics, especially in Africa, south and central America and south east Asia."